SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492015-03-03T13:28:11-07:00SparkFun Electronicsandloin on COM-00307 - Thermocouple Amplifier Digital MAX6675andloinurn:uuid:23a5c219-9202-ff82-dfd3-0c51dc3cd7182015-02-12T19:27:32-07:00<p>Gnnh. I needed one that goes past 1700C for accurate temp measurement for melting titanium.</p>Jesse214 on COM-00307 - Thermocouple Amplifier Digital MAX6675Jesse214urn:uuid:705f4e0d-5f3d-07be-6fc5-22b84f40aa2b2014-06-19T13:07:55-06:00<p>This is a great chip for thermocouple applications. I had used this years ago for a project. I had documented my work with it, which some may find helpful. Check it out here: http://www.nuclearprojects.com/thermocouple/</p>Customer #292829 on COM-00307 - Thermocouple Amplifier Digital MAX6675Customer #292829urn:uuid:e9b4c53a-b011-90e7-f74f-d14133d5a7932012-09-17T19:46:26-06:00<p>I was really interested in the tutorial link, but it is broken!</p>
<p>I found another one here, in case Michael&rsquo;s tutorial is permanently gone:
http://learn.adafruit.com/thermocouple/overview</p>Customer #326474 on COM-00307 - Thermocouple Amplifier Digital MAX6675Customer #326474urn:uuid:d5c30119-944d-d4c1-7746-566bb7beed5a2012-07-02T09:55:58-06:00<p>So&hellip;.Is there any reason we couldn&rsquo;t use an E-type thermocouple, and use the reported Celsius value to backcalculate the real Celsius value?</p>
<p>Maybe I don&rsquo;t follow exactly what&rsquo;s going on.</p>Sleahey on COM-00307 - Thermocouple Amplifier Digital MAX6675Sleaheyurn:uuid:8f39994d-289d-63c7-b54e-4e7a8e1a93702011-09-04T18:54:22-06:00<p>update: It works&hellip;</p>Sleahey on COM-00307 - Thermocouple Amplifier Digital MAX6675Sleaheyurn:uuid:90621baf-ba8d-97c6-dd03-9c2551766b6e2011-09-02T16:26:31-06:00<p>In theory I think may affect the cold junction compensation a little, as would having long tracks between where the thermocouple terminates, and where the IC is located (as it measures temp on the IC to compensate)<br/>
I see no reason why it would cause a problem,<br/>
in particular the amplifier is likely Hi-z, and the source impedance of the thermocouple is low, like 1R ~ 10R depending on the particulars.<br/>
offsets introduced by using the switch (if there are any) would be the thing to look out for.</p>scottj on COM-00307 - Thermocouple Amplifier Digital MAX6675scottjurn:uuid:92abd40a-6211-0daf-ffd3-fab8bca5bb952011-08-30T07:57:38-06:00<p>would this work with Serial Multiplexer Breakout - TS3A5017<br/>
(sku: BOB-08970)<br/>
Has anyone tried this? I would like to use 4 thermocouple probes, but avoid expense of 4 of MAX6675 chips.<br/>
Is there a BOB board available for this chip?</p>Sleahey on COM-00307 - Thermocouple Amplifier Digital MAX6675Sleaheyurn:uuid:c4f300b0-176c-4239-5fb4-fdd984ed51f52011-08-13T21:49:43-06:00<p>Has anyone tried using these on a shared SPI bus?</p>tjfreebo on COM-00307 - Thermocouple Amplifier Digital MAX6675tjfreebourn:uuid:777f4a17-ad4e-78db-52f2-7c81c109059e2011-07-07T13:35:17-06:00<p>There&rsquo;s a nice <a href="http://www.arduino.cc/playground/Main/MAX6675Library" rel="nofollow" >Arduino Max6675 Library</a> available to really simplify reading temperature data from this amplifier.</p>rj44319 on COM-00307 - Thermocouple Amplifier Digital MAX6675rj44319urn:uuid:736c302a-31ed-6c75-da39-2a6c7415f5442011-03-11T18:44:46-07:00<p>No, Use separate chips and use common ck and DO lines and then have multiple CS lines. Works great for me.</p>rj44319 on COM-00307 - Thermocouple Amplifier Digital MAX6675rj44319urn:uuid:1d86c7c2-032d-554e-8fb6-2a18284817032011-03-11T18:43:07-07:00<p>fix</p>PolePole on COM-00307 - Thermocouple Amplifier Digital MAX6675PolePoleurn:uuid:f20e9c09-0ce3-fca5-4b35-4defc65e83bf2011-01-29T13:13:05-07:00<p>Could I use a multiplexer with one 6675 to read from multiple thermocouples, or do I need a 6675 for each thermocouple in my project?</p>